add "atltest" tool for parallel testing of tcl "*.test" files

add a new tool
atltest is a tool for testing the *.test files from the theATL/tests directory.
*  The test file (*.test) from the theATL/atlsh/tests directory is mirrored to the theATL/tests directory via a soft link.
**   The theATL test environment is created without changes to the atlsh distribution.
*  Massive parallel testing with the automake make check was implemented in the theATL/tests directory.
**   An adaptation to the tcltest tool and the *.test files was required.
*  The largest adaptation was made to the test cases (*.test) provided by TCL.
**   By default, TCL only supports sequential testing.
**   By default, TCL uses the same temporary file name across different test cases.
http://thedev.nhi1.de/theATL/main/index.htm
http://thedev.nhi1.de/theATL/main/atltest.htm